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dc.contributor.authorChaaban, Anas
dc.contributor.authorAl-Ebraheemy, Omer M. S.
dc.contributor.authorAl-Naffouri, Tareq Y.
dc.contributor.authorAlouini, Mohamed-Slim
dc.date.accessioned2017-03-20T08:46:08Z
dc.date.available2017-03-20T08:46:08Z
dc.date.issued2017-03-18
dc.identifier.citationChaaban A, Al-Ebraheemy OMS, Al-Naffouri TY, Alouini M-S (2017) Capacity Bounds for the Gaussian IM-DD Optical Multiple-Access Channel. IEEE Transactions on Wireless Communications: 1–1. Available: http://dx.doi.org/10.1109/TWC.2017.2681071.
dc.identifier.issn1536-1276
dc.identifier.doi10.1109/TWC.2017.2681071
dc.identifier.urihttp://hdl.handle.net/10754/623031
dc.description.abstractOptical wireless communications (OWC) is a promising technology for closing the mismatch between the growing number of connected devices and the limited wireless network capabilities. Similar to downlink, uplink can also benefit from OWC for establishing connectivity between such devices and an optical access point. In this context, the incoherent intensitymodulation and direct-detection (IM-DD) scheme is desirable in practice. Hence, it is important to understand the fundamental limits of communication rates over an OWC uplink employing IM-DD, i.e., the channel capacity. This uplink, modeled as a Gaussian multiple-access channel (MAC) for indoors OWC, is studied in this paper, under the IM-DD constraints which form the main difference with the standard Gaussian MAC commonly studied in the radio-frequency context. Capacity region outer and inner bounds for this channel are derived. The bounds are fairly close at high signal-to-noise ratio (SNR), where a truncated- Gaussian input distribution achieves the capacity region within a constant gap. Furthermore, the bounds coincide at low SNR showing the optimality of on-off keying combined with successive cancellation decoding in this regime. At moderate SNR, an optimized uniformly-spaced discrete input distribution achieves fairly good performance.
dc.description.sponsorshipTheir work was supported in part by the Qatar National Research Fund (a member of Qatar Foundation) under Grant NPRP 9-077-2-036. The statements made herein are solely the responsibility of the authors.
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)
dc.relation.urlhttp://ieeexplore.ieee.org/document/7880596/
dc.rights(c) 2017 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
dc.subjectcapacity approximation
dc.subjectIntensity-modulation
dc.subjectmultiple-access
dc.subjectcapacity bounds
dc.subjectsuccessive cancellation
dc.titleCapacity Bounds for the Gaussian IM-DD Optical Multiple-Access Channel
dc.typeArticle
dc.contributor.departmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
dc.contributor.departmentElectrical Engineering Program
dc.identifier.journalIEEE Transactions on Wireless Communications
dc.eprint.versionPost-print
dc.contributor.institutionDepartment of Electrical Engineering, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia.
kaust.personChaaban, Anas
kaust.personAl-Naffouri, Tareq Y.
kaust.personAlouini, Mohamed-Slim
refterms.dateFOA2018-06-13T16:11:37Z
dc.date.published-online2017-03-18
dc.date.published-print2017-05


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